<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert title="注意：只允许为第三级分类设置相关参数" type="warning" :closable="false" show-icon></el-alert>

      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader v-model="selectedCatKeys" :options="catList" :props="CatListProps" @change="handleCatChange" clearable></el-cascader>
        </el-col>
      </el-row>

      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addParamsDialogVisible = true">添加参数</el-button>
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(scope.row,i)">{{item}}</el-tag>
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" width="50px"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditParamsDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addParamsDialogVisible = true">添加属性</el-button>
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable>{{item}}</el-tag>
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" width="50px"></el-table-column>
            <el-table-column prop="attr_name" label="属性名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditParamsDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <el-dialog :title="'添加'+titleText" :visible.sync="addParamsDialogVisible" width="50%" @close="addParamsDialogClosed">
      <el-form ref="addParamsFormRef" :model="addParamsForm" label-width="100px" :rules="addParamsFormRules">
        <el-form-item :label="titleText+'：'" prop="attr_name">
          <el-input v-model="addParamsForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <el-dialog :title="'修改'+titleText" :visible.sync="editParamsDialogVisible" width="50%" @close="editParamsDialogClosed">
      <el-form ref="editParamsFormRef" :model="editParamsForm" label-width="100px" :rules="editParamsFormRules">
        <el-form-item :label="titleText+'：'" prop="attr_name">
          <el-input v-model="editParamsForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catList: [],
      selectedCatKeys: [],
      CatListProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addParamsDialogVisible: false,
      addParamsForm: {
        attr_name: ''
      },
      addParamsFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      editParamsDialogVisible: false,
      editParamsForm: {},
      editParamsFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCatList()
  },
  methods: {
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.catList = res.data
    },
    async getParamsData() {
      if (this.selectedCatKeys.length === 0) {
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    handleCatChange() {
      this.getParamsData()
    },
    handleTabClick() {
      this.getParamsData()
    },
    addParamsDialogClosed() {
      this.$refs.addParamsFormRef.resetFields()
    },
    addParams() {
      this.$refs.addParamsFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.catId}/attributes`, {
          attr_name: this.addParamsForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.getParamsData()
        this.addParamsDialogVisible = false
      })
    },
    async showEditParamsDialog(attrid) {
      this.editParamsDialogVisible = true
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes/${attrid}`, {
        params: { attr_sel: 'many' }
      })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.editParamsForm = res.data
    },
    editParams() {
      this.$refs.editParamsFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${this.editParamsForm.attr_id}`, {
          attr_name: this.editParamsForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.getParamsData()
        this.editParamsDialogVisible = false
      })
    },
    editParamsDialogClosed() {
      this.$refs.editParamsFormRef.resetFields()
    },
    async deleteParams(attrid) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`categories/${this.catId}/attributes/${attrid}`)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getParamsData()
    },
    showInput(row) {
      row.inputVisible = true
      // 文本框自动获取焦点
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async saveAttrsVals(row) {
      const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrsVals(row)
    },
    handleClose(row, i) {
      row.attr_vals.splice(i, 1)
      this.saveAttrsVals(row)
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCatKeys.length === 0) {
        return true
      }
      return false
    },
    catId() {
      if (this.selectedCatKeys.length === 3) {
        return this.selectedCatKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
  .cat_opt {
    margin: 15px 0;
  }

  .el-tag {
    margin: 10px;
  }
  .input-new-tag {
    width: 120px
  }
</style>
